Combination air and oil valve



Dec. 3, 1929. c. w. JOHNSON 1,733,071

COMBUSTION AIR AND OIL VALVE Filed Dec. 15. 1927 Patented Dec. 3, 1929UNITED STATES PATENT OFFICE CHARLES W. JOHNSON, OF SEATTLE, WASHINGTONCOMBINATION AIR AND OIL VA LVE Application filed December 15, 1927.Serial No. 240,255.

having an air inlet and an oil inlet, and the general object of thepresent invention is to provlde an 011 valve which 1s normally closedbut which will automatically open simultaneously with the inflow of air.

A further object is to provide a construc- M) tion of this characterwherein the oil valve is normally pressed against its seat by a springbut is provided with a lever and an impact member against which the airis projected, the projection of the air against this impact memberacting to open the valve when the air is turned on.

My invention is illustrated in the accompanying drawing, wherein Figure1 is a schematic elevation of a furnace with my improved burnermechanism applied thereto;

Figure 2 is a longitudinal sectional view through the automatic air andoil valve which particularly constitutes the subj cot-matter of thisapplication.

Referring to this drawing, and particularly to Figure 1, 10 designatesthe casing of the air and oil valve, which casing at one end is providedwith the atomizing nozzle 11, this atomizing nozzle being of any suitable character but preferably rifled on its interior face so as to forceout the mixed air and oil with a centrifugal whirl. This nozzle hasscrew-threaded engagement with the burner head or casing 10. The rearend of the burner head or casing is provided with the air inlet pipe 12which is connected to an air compressor of any suitable character,designated 13 in Figure 1. Any other suitable source of air may be used,however.

The casing 10 is also providedwith the oil inlet port formed with a seat14 with which coacts a valve 15 illustrated as being conical in form andheld to the seat by means of a spring 16. The oil line 17 is enlarged toform a valve casing 18 within which the valve 15 and its spring aredisposed. The apex of the valve is connected to a lever 19 having theform of a bell crank lever. One arm of this lever is connected to thevalve and the other arm carries upon it a plate 20 which extends infront of or across the air inlet port 21 which is connected to the pipe12.

Normally, and when the burner is not in use, the impact plate or bailleplate 20 extends across the end of the port 21, but when air is admittedor when the compressed air begins to flow due to the starting of theplant and this compressed air strikes the baffle plate or impact plate20, it opens the oil valve, causing the airand oil to flowsimultaneously into the burner head or casing 10. The forward end ofthis casing is tapered, as shown, so as to discharge the mixed air andoil into the nozzle 11 and so into the furnace. Preferably the air andoil. valve and the burner head will be mounted as illustrated in myco-pending application, Serial #240,254 filed of even date herewith. Itwill be seen that the construction which I have devised provides aneconomical, safe, positive and leak-proof oil valve which isparticularly desirable. The oil cannot flow unless the air is flowingand thus minimizes leakage and expense.

In Figure 1, I have illustrated the general connection of this air andoil valve-in an oil burner plant, and in this figure A designates thefurnace and B the fire door thereof. The burner head is preferablymounted in a hemispherical. member C which is supported with-, in thefurnace for adjustment, as illustrated in the prior application abovereferred to. The air pipe 12 extends to an air compressor 13, previouslyreferred to, while the oil pipe 17 extends to a gravity tank D. The oilis, pumped into this tank by the oil pump E operated by the motor F,which is preferably an electric motor. The oil is pumped from anysuitable reservoir or tank Gr. Valves H are provided in the oil and airline for controlling...

I claim 1. A burner head for oil burners, having an outlet opening atone end and at the other end having an air inlet opening, the side wallof the head being formed with a valve seat, an oil controlling valvecoacting with said seat and resiliently urged to a seating position, anair valvehinged to the rear wall of thehead and adapted to extend acrossthe air inlet opening and having an angularly extended portion bearingagainst the inner end of the oil valve, whereby the air valve auto- Imatically causes the opening of the oil valve 1 when the pressure of airis greater than the it so:

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pressure urging the oil valve to its seat.

2. A burner head for oil burners having an air inlet port at one end andan outlet port at the other end and having an oil inlet port in its sidewall, a rectilinearly movable valve operating in the oil inlet port andurged to its seat and having a portion extending through the oil inletport, an air valve normally disposed to close the airinlet port andhaving an an ular portion bearing against the inner endo? the oil inletvalve, the oil inlet valve normally urging the air valve to its seat,the air valve under pressure of air behind it when said ressure isgreater than the pressure urging t e oil valve to its seat causing theopening of the oil valve.

In testimony whereof I hereunto afiix my CHARLES W. JOHNSON.

